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FOSCARNET (fos KAR net) is an antiviral medicine. It is used to treat or prevent infections caused by certain kinds of viruses. Examples of these infections include herpes and cytomegalovirus (CMV).
This medicine may be used for other purposes; ask your health care provider or pharmacist if you have questions.
They need to know if you have any of these conditions:
low blood calcium
nervous system disease
an unusual or allergic reaction to foscarnet, other medicines, drugs, dyes, or preservatives
pregnant or trying to get pregnant
This medicine is for infusion into a vein. It is given by a health care professional in a hospital or clinic setting.
Talk to your pediatrician regarding the use of this medicine in children. Special care may be needed.
Overdosage: If you think you have taken too much of this medicine contact a poison control center or emergency room at once.
NOTE: This medicine is only for you. Do not share this medicine with others.
This does not apply.
Do not take this medicine with any of the following medications:
This medicine may also interact with the following medications:
certain antibiotics given by injection
This list may not describe all possible interactions. Give your health care provider a list of all the medicines, herbs, non-prescription drugs, or dietary supplements you use. Also tell them if you smoke, drink alcohol, or use illegal drugs. Some items may interact with your medicine.
Visit your doctor or health care professional for regular check ups. Discuss any new symptoms with your doctor. You will need to have important blood work done while on this medicine. If you have a CMV eye infection have your eyes checked every 4 to 6 weeks.
Drink 6 to 8 glasses of water or fluids daily while taking this medicine to help prevent side effects.
Tell your doctor right away if you have any tingling or numbness in your mouth or in your arms or legs. This may be a sign of a serious problem.
Side effects that you should report to your doctor or health care professional as soon as possible:
allergic reactions like skin rash, itching or hives, swelling of the face, lips, or tongue
changes in vision
fast or irregular heartbeat
fever or chills, sore throat
pain, swelling at site where injected
numb, tingling pain
trouble passing urine or change in the amount of urine
unusual bleeding or bruising
unusually tired or weak
Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):
aches and pains
loss of appetite
This list may not describe all possible side effects. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.
Keep out of the reach of children.
If you are using this medicine at home, you will be instructed on how to store this medicine. Throw away any unused medicine after the expiration date on the label.